linux-kernel - [PATCH v2 0/2] Allow syscon to use spinlocks with regmap fast

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Date:   Mon,  4 Apr 2022 10:47:30 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     lee.jones@...aro.org
Cc:     robh+dt@...nel.org, krzk+dt@...nel.org, arnd@...db.de,
        matthias.bgg@...il.com, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, nfraprado@...labora.com,
        kernel@...labora.com, krzysztof.kozlowski@...aro.org,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Subject: [PATCH v2 0/2] Allow syscon to use spinlocks with regmap fast_io

This series adds support for enabling the regmap's fast_io configuration
option for SoCs featuring very fast MMIO operations, for which mutexes
are introducing a lot of overhead / latency.

This has been tested locally on some MediaTek Chromebooks (but, of course,
that requires devicetree patches that are not included in this series).

Changes in v2:
- Reworded dt-bindings fast-io description to remove references
  to regmap, making it generic, as per Krzysztof's suggestion.

AngeloGioacchino Del Regno (2):
  mfd: syscon: Allow using spinlocks with regmap fast_io
  dt-bindings: mfd: syscon: Add support for regmap fast-io

 Documentation/devicetree/bindings/mfd/syscon.yaml | 15 +++++++++++++++
 drivers/mfd/syscon.c                              |  4 ++++
 2 files changed, 19 insertions(+)

-- 
2.35.1